Queue using an array. .head.tail Pointers head and tail always point to the first empty slot before or after elements in the list. Thus, initially they.

Queue using an array

.head .tail

Pointers head and tail always point to the first empty slot before or afterelements in the list. Thus, initially they point to the same slot, say 0.

.head.tail

Add object to rear of list1

.head.tail

Add object to rear of list1 2

.head.tail

Add object to rear of list1 2 3

.head.tail

Add object to rear of list1 2 3 4

.head .tail

Remove from front

1

2 3 4

.object

.head .tail

Remove from front

2

3 4

.object

.head .tail

Add3 4 5

.head .tail

Remove4 5

3

.object

.head .tail

Add4 5 6

.head .tail

Add4 5 6 7

.head.tail

Add4 5 6 7 8

.tail .head

Add4 5 6 7 89

Queue using Circularly Linked List

.tail

Circularly linked list

.tail

Queue: insert item at rear, remove at front

.tail

Queue: remove from front

_object = tail->next->item;

_object

.tail


_temp = tail->next;

_object

Temp

_temp

.tail


_tail->next = tail->next->next;

_object

Temp

_temp

.tail


_delete temp;

_object

Temp

_temp

.tail


_return object;

_object

Temp

.tail


_

Temp

.tail

Queue: insert at rear

_

Temp

.tail


_cell = new Cell(object);

Temp

_cell

NULL

.tail


_cell->next = tail->next;

Temp

_cell

.tail


_tail->next = cell;

Temp

_cell

.tail


_tail = tail->next;

Temp

_cell

Queue using an array. .head.tail Pointers head and tail always point to the first empty slot before or after elements in the list. Thus, initially they.

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